Solar wind correlations: Statistical and case studies

. Recent work on solar wind plasma correlations using data from several widely#separated spacecraft #IMP 8# INTERBALL#1# WIND# and ISEE#3# has shown that# for 6#hour periods# the average plasma correlation is #0.7. The focus of these studies has been directed toward a statistical understanding of gross solar wind correlation behavior. In all correlations examined# lower average correlations are caused by the presence of many points from the low correlation subpopulation# nevertheless# data points from the high correlation population are still present. No single organizational factor has yet been found which adequately separates low#correlation periods from high#correlation periods. Some of the spread in correlations is due to the spatial orientations and dimensions of solar wind structures# and thus to the locational alignments of the spacecraft being correlated# but this does not adequately explain all the good or poor correlations since sometimes three nearby spacecraft sh..